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  1. Core Server
  2. SERVER-16954

Removing objects from under a geo $near query causes invalid memory access

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    • Type: Icon: Bug Bug
    • Resolution: Done
    • Priority: Icon: Major - P3 Major - P3
    • 3.0.0-rc6
    • Affects Version/s: 2.8.0-rc5
    • Component/s: Geo, Querying
    • Fully Compatible
    • ALL
    • Hide 
      t = db.geo_near
t.drop();

for (var x = -1; x < 1; x += 1) {
    for (var y = -1; y < 1; y += 1) {
        t.insert({geo: [x, y]})
    }
}

t.ensureIndex({ geo : "2d" })

var cur = t.find({geo: {$near: [0,0], $maxDistance: 3}}).batchSize(2);
cur.next();
cur.next();
t.remove({})
cur.next();
      Show
      t = db.geo_near t.drop(); for ( var x = -1; x < 1; x += 1) { for ( var y = -1; y < 1; y += 1) { t.insert({geo: [x, y]}) } } t.ensureIndex({ geo : "2d" }) var cur = t.find({geo: {$near: [0,0], $maxDistance: 3}}).batchSize(2); cur.next(); cur.next(); t.remove({}) cur.next();

      It seems like the GEO_NEAR_2D stage fails to realize when an object is removed from under it, see repro below. This only causes a failure on an MMAPV1 Node, no issues on a wiredTiger node, or a 2.6.6 node. Log attached.

        1. mongod.log
          10 kB

            Assignee:
            david.storch@mongodb.com David Storch
            Reporter:
            charlie.swanson@mongodb.com Charlie Swanson
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              Created:
              Updated:
              Resolved: